Experimental characterization, modeling and compensation of hysteresis in force sensing resistors

Force Sensing Resistors (FSRs) exhibit considerable amounts of hysteresis and repeatability error inhibiting their usage in applications that require high-accurate force readings. This paper presents the hysteresis characterization and modeling of the Tekscan A201-1 FSR employing the Preisach Operator (PO) function. In order to compensate for hysteresis during sensor operation, the inverse PO was numerically found on the basis of the Closest Match Algorithm (CMA). A test bench, capable of handling sixteen sensors simultaneously, was built, which allowed the characterization and later testing of the CMA. Grip force profiles were applied to the sensors during testing and the experimental results showed a considerable reduction in the force estimation error compared with the linear regression method proposed by the manufacturer. These results enable a wider use of FSRs in applications with tight accuracy requirements. Finally, a generalized sensor model for hysteresis compensation that simplifies the obtaining of PO parameters is presented.

• Autores: Paredes-Madrid, Leonel; Matute, Arnaldo; Cruz-Pacheco, Andrés F.; Parra Vargas, Carlos A.; Gutiérrez Veláquez, Elkin Iván
• Tipo de recurso: Article of journal
• Fecha de publicación: 2018
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/68501
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/68501; http://bdigital.unal.edu.co/69534/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; hysteresis; force sensing resistors; Preisach operator; closest match algorithm; sensores de fuerza resistivos; operador de Preisach; algoritmo de coincidencia más cercana
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional